21330312223 has 16 divisors (see below), whose sum is σ = 23649129216. Its totient is φ = 19075573440.

The previous prime is 21330312221. The next prime is 21330312277. The reversal of 21330312223 is 32221303312.

It is not a de Polignac number, because 21330312223 - 2¹ = 21330312221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330312194 and 21330312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330312221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528115 + ... + 567067.

It is an arithmetic number, because the mean of its divisors is an integer number (1478070576).

Almost surely, 2^21330312223 is an apocalyptic number.

21330312223 is a deficient number, since it is larger than the sum of its proper divisors (2318816993).

21330312223 is a wasteful number, since it uses less digits than its factorization.

21330312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39774.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21330312223 its reverse (32221303312), we get a palindrome (53551615535).

The spelling of 21330312223 in words is "twenty-one billion, three hundred thirty million, three hundred twelve thousand, two hundred twenty-three".